Rath H, Panda B, Verma A, Nayak A, Jena J. System based phosphorus management improved the productivity, profitability and nutrient uptake of rainfed rice (Oryza sativa L.) - greengram (Vigna radiata L.) cropping system. ORYZA. 2022;59(2):205-210. Accessed October 21, 2025. https://epubs.icar.org.in/index.php/OIJR/article/view/125286